The effective Lagrangian approach is used to give the concrete expressions of the decay amplitudes defined in Eq. (REF ). Due to the requirement from the heavy quark limit and the chiral symmetry, the concerned effective Lagrangians include [1]}, [2]}, [3]}, [4]}
\(\begin{split}\mathcal {L}_{S}=&\ ig_{S}\text{Tr}[S^{(b\bar{b})}\bar{H}^{(\bar{b}q)}\gamma ^{\mu }\overset{\leftrightarrow }{\partial }_{\mu }\bar{H}^{(b\bar{q})}]+\text{H.c.},\\\mathcal {L}_{D}=&\ ig_{D}\text{Tr}[D_{\mu \nu }^{(b\bar{b})}\bar{H}^{(\bar{b}q)}\overset{\leftrightarrow }{\partial }_{\mu }\gamma ^{\nu }\bar{H}^{(b\bar{q})}]+\text{H.c.},\\\mathcal {L}_{\mathbb {P}}=&\ ig_{H}\text{Tr}[H^{(b\bar{q})\text{j}}\gamma _{\mu }\gamma _{5}(\mathcal {A}^{\mu })^{\text{i}}_{\text{j}}\bar{H}_{\text{i}}^{(b\bar{q})}]\end{split}\) 
